Three methods to improve the performance of lithium battery cathode materials

Three ways to improve the performance of lithium battery cathode materials! The voltage of advanced lithium battery anode materials is a new idea to improve the energy density of lithium batteries in recent years. High-voltage materials include two cathode materials: spinel-like crystal structure and olivine-like crystal structure. LiMPO4(Mu003dCo,Ni) is a typical high-pressure olivine crystal structure material. Among them, the discharge potential of LiCoPO4 is 4.8v, the discharge potential of LiNiPO4 is 5.2v, and the theoretical capacity is close to 170mAh/g. 5.2v is currently the highest charge and discharge voltage. Since there is no matching electrolyte yet, there is no report on the battery function of lithium-lithium cathode material. There are many reports on LiCoPO4 materials, but the LiCoPO4 materials obtained under the existing electrolyte system have poor cyclic charge and discharge functions. Three technologies positive lithium battery cathode material function! Under high pressure conditions, the olivine-like crystal structure has three side uses: 1. The anode material reacts with the electrolyte to form a solid-liquid interface layer; 2.2. The electrolyte will partially dissolve Co ions, which greatly reduces the cyclic charge and discharge function of the lithium battery; 3. The conductivity is poor and the conductivity is low. Therefore, it is necessary to use the high-pressure olivine crystal structure to apply the necessary means to improve its function. There are three kinds of these means. 1. Nano-ization. Nanoparticles have shorter lithium ion and electron transport and diffusion paths than microparticles. 2. Stimulants. Unlike the spinel-like crystal structure that can be doped with cations and anions at the same time, the olivine-like crystal structure is only doped with cations. 3. Coating. Amorphous carbon coating can form a high-speed electron transmission channel, thereby enabling the forward function, especially the forward primary discharge capacity and charge-discharge cycle function. LiMPO4 In general, the olivine-like crystal structure (Mu003dCo, Ni) has more theoretical capabilities than the spinel-like crystal structure, but due to the low conductivity and poor blood circulation, the research of lithium battery anode materials And the development of research and development of lithium batteries without spinel-like crystal structure, and input to the stage of industrialization to improve technology and more advanced functions, the first is the electric vehicle power lithium battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.